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Replacement for E1A606-724 / 2-24b power transformer

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  • #31
    Alright two questions:

    1. the 30-0-30 lines into a rectifier round out to 41.32 after rectification and voltage drop, the 1.32 extra volt won’t damage the +/- 40 lines? That small bit of voltage is ok?

    2. If I tap off a line from the 24v line and use a voltage regulator for an 18 volt line to run another circuit in the amp, The amp should function? I don’t need to change the amp to run that single 18 volt line? As in changing
    Power section or the power transistors?

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    • #32
      Alright, you are interested for theoretical questions.
      You will have to make an effort and read some books that will give you all answers for your questions.

      https://www.scribd.com/document/486929944/Merlin-Blencowe-Designing-Tube-Preamps-for-Guitar-and-Bass-2009-pdf

      https://www.scribd.com/doc/197851221/Solid-State-Guitar-Amplifiers

      https://www.n5dux.com/ham/files/pdf/Electronics%20for%20Dummies.pdf

      https://www.scribd.com/document/81577785/Designing-v-T-Amplifiers

      https://www.trinityamps.com/ForumGallery/trinity/resources/Jack_Darr_Handbook.pdf

      http://www.hammondmfg.com/pdf/5c007.pdf 1)

      The portal is there to help with practical repair issues.

      vk
      Last edited by vintagekiki; 02-01-2021, 12:04 AM. Reason: 1)
      It's All Over Now

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      • #33
        It is just a guitar amp, nothing precision. On a 40v rail, and extra volt and a half is nothing, less that 5% off.


        And while we need to be in the ball park for voltages and such, no one designs amplifiers where voltage ratings are only 1 or 2 volts below the circuit normal voltage.
        Education is what you're left with after you have forgotten what you have learned.

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        • #34
          Originally posted by Shrimpfarmer89 View Post
          Hello, I am looking for a replacement transformer for an old E1A606-724 / 2-24b power transformer that has 5 wires coming off it. Cant find any online with just 5 wires on it.

          any recommendations? Thanks!
          I did a quick read through and didn't see anyone mention this yet, so I apologize if this has already been addressed..
          The "E1A606-724" you site which is stamped on the transformer is not a model number or an identifier that has anything to do with the amplifier in general. It's called an "EIA" (eia) code which is used to identify the manufacturer and date of manufacture. For instance, the "EIA" indicates that it's an EIA code. Then, reading right to left. the first two numbers indicate the week of manufacture (24th week in your example). the 3rd numerical character from the right indicates the year of manufacture in any given decade (So, either '74/84/94/ect in your example), and the last 2 or 3 numbers beginning with the 4th number from the right are the manufacturer's identifier, unique to each manufacturer (the "606" in your example indicates that it was manufactured by Schumacher).
          If I have a 50% chance of guessing the right answer, I guess wrong 80% of the time.

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